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Equation of state for polymers based on glass transition data

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Abstract

This paper addresses a method for predicting the participating constants in equation of state (EOS) for compressed polymeric fluids using two scaling constants, the surface tension γ g and the molar density ρ g, both at the glass transition point. The theoretical EOS undertaken is the one attributed to Tao and Mason. The second virial coefficients are calculated from a two-parameter corresponding states correlation, which is constructed with two constants as scaling parameters, i.e., the surface tension γ g and the molar density ρ g. This new correlation has been applied to the Tao–Mason (TM) EOS to predict the volumetric behavior of several polymer melts. The operating temperature range is from 291.25 to 603.4 K and pressures of up to 202.5 MPa. A collection of 516 data points has been examined for the aforementioned polymers. The average absolute deviation between the calculated densities and the experimental ones is of the order of 0.44%.

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Acknowledgments

The first four authors are grateful to the Shiraz University of Technology, Shiraz University and Payame noor University for supporting this research project.

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Authors and Affiliations

  1. Department of Chemistry, Shiraz University of Technology, Shiraz, 71555-313, Iran

    Mohammad Mehdi Papari & Masoumeh Kiani

  2. Department of Chemistry, Payame Noor University (PNU), Ardakan, Iran

    Reza Behjatmanesh-Ardakani & Masoumeh Kiani

  3. Department of Chemistry, Shiraz University, Shiraz, 71454, Iran

    Jalil Moghadasi

  4. Department of Mechanical Engineering, The University of Texas at San Antonio, San Antonio, TX, 78249, USA

    Antonio Campo

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  1. Mohammad Mehdi Papari
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  2. Reza Behjatmanesh-Ardakani
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  3. Masoumeh Kiani
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  4. Jalil Moghadasi
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  5. Antonio Campo
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Correspondence to Mohammad Mehdi Papari.

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Papari, M.M., Behjatmanesh-Ardakani, R., Kiani, M. et al. Equation of state for polymers based on glass transition data. Colloid Polym Sci 289, 1081–1087 (2011). https://doi.org/10.1007/s00396-011-2427-7

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  • DOI: https://doi.org/10.1007/s00396-011-2427-7

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